.darg-page {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    background-color: #fff;
    padding: 10px;
}

.drag-option {
    height: 40px;
}

.drag-parent {
    position: relative;
    width: 100%;
    height: 0;
    flex: 1;
    background-image: linear-gradient(to right,
            rgba(0, 0, 0, .1) 1px,
            transparent 1px,
            transparent 10px),
        linear-gradient(to bottom,
            rgba(0, 0, 0, .1) 1px,
            transparent 1px,
            transparent 10px);
    background-size: 10px 10px;
}

.modal {
    background-color: yellow;
}

.dragging {
    outline: 1px solid #000;
}